Work-handling mechanism for blindstitch sewing-machines.



1. e. LEWIS. ECHANISM FOR BLINDSTITCH SEWING MACHI APPLICATION FILED EC. 5. I913- NES.

WORK HANDLlNG M & M m1 S a 1. U6 m V a m mfi 1. G. LEWlS. DLING MECHANISM FOR BLINDSTITCH SEWING MACHINES.

WORK HAN- APPLlCAfION FILED DEC. 6.19l3. 1 ,254,81.8, Patented Jan. 29, 1918. E 4 5 SHEETS-SHEET 2- 1E] .s' z

za a; 74 75 1W4.

jaw/275i Jo/2 72 lama" 1. G. LEWIS; MECHANISM FOR BLINDSTITCH SEWING MACHINES.

WORK HANDUNG AFPLIC AT|0N FILED DEC. 6. I913 Patented Jan. 29, 1918'.

5 shins-SHEET s l. G. LEWIS. ECHANISM FOR BLINDSTHCH SEWING MACHINES. APPLICATION FILED 050. s. 1913.

WORK HANDLING M Patented Jan. 29,1918

5 SHEETS-SHEET 4 fur v707u u J. G. LE WIS. WORK HANDLING MECHANISM FOR BLINDSTITCH SEWING MACHINES.

APPLICATION mznpzc. 6-. 191.3. I M

Patented Jan. 29, 1918. 5 SHEETS-SHEET s.

w M M Zia/672257 uf/uv Jews M w .2 M M M 4 WW ma JOHN G. LEWIS, OF ST.

LOUIS, MISSOURI.

WORK-HANDLING MECHANISM FOR BLINDSTITCH SEWING-MACHINES.

Specification 01' Letters Patent.

- Patented Jan. 29, 1918.

Original application filed December 24, 1910, Serial No. 599,071. Patented February 22, 1916, No. 1,172,812.

Divided and this application filed December 6, 1913.

To all whom it may concern:

Be it known that I, JOHN G. Lnwis, a citizen of the United States, residin at St. Louis, in the city of St. Louis and tate of Missouri, have invented certain new and useful Improvements in lVork-Handling Mechanism for Blindstitch Sewing-Machines, of which the followin is a specification.

My invention re ates to improvements in sewing machines, and in some of its'features more particularly to blind stitch sewing machines, especially of the type illustrated in my copending application, Serial N 0. 599,071 filed December 2 1, 1910, which matured into Patent No. 1,172,812, dated February 22, 1916, of which application this is a division.

Among the general objects of my inven tion I'seek to provide a machine readily' adapted, in the character of its work-handlin g mechanism, to widely different sorts of work; capable of high speed and fast operation; suitable for handling materials of widely varying thickness and abruptly changing numbers of plies; and generally of simple and efiicient construction and organization.

The many novel features of my invention productive of improved and novel mechanical organization, and resulting in the performance of novel functions may best be ascertained from the appended claims in conjunction with the following specification and accompanying drawings.

' In the drawings Figure 1 is a front elevation of a flatbed machine; 11'. e., a machine for handling flat work, and accordingly having a wide work-support;

Fig. 2 is an end elevation with parts in section showing the work handling mechanism and associated presser foot;

I Fig. 3 is a sectional view on line 33 of Fig. ,7 showing said mechanism from the opposite side;

Fig. 4. is a vertical section on line 4-4 of Fig. 2;

Fig. 5 is a plan view of the parts shown in Fig. 2; y

Fig. 6 is a sectional detail on 1111c 6-6 of F ig. 7;

Fig. 7 is a vertical section through the lower arm of the machine;

Serial No. 805,160.

' Fig. 8 is a detail of the spring support;

Fig. 9 is a sectional detail on line 9-4) of Fig. 7

Fig. 10 is an enlarged vertical section through the rear post of the machine;

Fig. 11 is a cross section through said P Fig. 12 is an enlarged detail of the feedlength-ad j usting eccentric;

Fig. 13 is a section on line 13-13 of Fig. 12;

Fig. 14 is a sectional detail of aplunger and clamp;

Fig. 15 is a sectional detail showing such plunger and a cooperating presser foot.

The machine organization in general. as herein shown, preferably comprises a frame having an upper arm 21, carrying the head 22 for the stitching mechanism. In said head are arranged the moving parts of the stitclrforming mechanism, working above the presser foot 23. which may he substantially stationary. The upper arm 21 projects from the standard or post 25 supported by a base casting 26 constituting a lower arm of the machine, and affording support. to the working parts of the work-handling mechanism generally indicated at 27, (Fig. 1). In the particular construction shown the base 26, is adapted to fit an opening cut therefor in a work table 28 and above the frame there is provided a flatwork support 29 pivo ed as at 30 inears provided on the frame 26. and bearing near its free end on an adjustable stop 30. The work support 29 is provided with a suitable opening 31 through w'hichthe feed and Plunger mechanism may work, such opening prefer-ably flanked by slide plates 32 remorableto give readv access to the subjacent parts.

Stitch forming mechanism, such as't'hat generally illustrated in Fig. 1, is fully described in my copending application, of which this is a division, and for presentpurposes it sufiices to say said stitch forming mechanism 22 comprises a reciprocating, curved. side pointed needle 22', working above the presser foot and cooperating with a rotary hook 22 and suitable thread controlling narts. for the formation of blind lock stitches, the needle entering and emerging from the same side of the work which is presented to the action of the needle through an opening 23 in the presser foot 23. l

The Work handling devices comprise in general, a plunger or bender reclprocable to present the sliich-recelving portion of the goods through the presser foot open ng 23; clamping means to cooperate with the presser foot to clamp the goods thereagamst at the time the plunger elevates the node of goods through the presser foot opening; and a 4-Way feed structure. The active parts of these instrumentalities receive motion from these shafts 41, 42, and 13 extending longr 'tudinally through the lower arm of the machine and at their outer end finding bearing in a head block 40 which is preferably in the form of a major segment of a cylinder, attached to the base by screws 40. lhe arrangement shown is advantageous 1n that it brings all of the longitudinal shafts of the base into an area of small compass so that, if desired, said shafts and mechanisms may be readily mounted on a base cylinder of relatively small size in lieu of the flatbed, the block 4-0 conforming to the end of such a cylinder. In this way the machine may be set up for work on sleeves, trousers bottoms and the like, with only a change of the base casting and work suport. The plunger or bender generally indicated at is a vertically reciprocating member operated by the rock-shaft 41. It is provided with an appropriately shaped nose or tip to cooperate with the back of the goods in elevating a node of goods through the presser foot opening 93 In the particular construction shown, lflindicates a barrel of the plunger mounted to slide vertically in a guide opening in head block 40, the bottom of said barrel being reduced to form a throat 47 secured in an offset lug 4'8 projecting from a slide plate 49 which works in a slide way 50 in the inner face of the head block e0, said slide way opening to a recess 51 across the bottom of the block-to accommodate the movement of the lug l8.v To impart vertical movement to the slide 49 the plunger-operating rockshaft 41 hasa crank '53 having a pivotal connection with. link 54, the opposite extremity of, which is pivotally connected to the slide 49. In order that the limit of vertical movement of theslide 49 may be varied and the limit of movement of the plunger. correspondingly changed, the con- 'nection between the slide 49 and the upper extremity of link 5% is made adjustable. To this cndthe upper extremity of link 5tis formed into a clamp 55 engaging a .rotarily adjustable sleeve 56 ecc'entrically apertu-red and surrounding a pin 57 projecting from the slide 49. Obviously by rotating the ec+ centric 56 by means of its knurled head 58,

and clamping it in desired position, effective variation in the limits of throw of the plunger may be attained at Will.

The tip or nose of the plunger is preferably yielding relative to the body or positively-moved part thereof, to constitute a yielding back guide. To this end the head 60 is mounted on a stem bl extending into the central bore of the barrel 46 and reduced at its lower end, as at 62 to pass through the throat 47 and receive the exterior stop nuts 63. The reduced portion 62 of the stem is surrounded by a coiled spring 64- yieldingly maintaining the stem at its upper limit of movement relative to the barrel. Rotation of the stem relative to the barrel is prevented by slot and key engagement thcrebetween, as shown by kev 65 and slots (36. The yieldabiliiy of the plunger thus provided is particularly advantageous in relieving the machine from strain under extraordinary increases in the thickness of Work.

Preferably the power connections of the plunger mechanism, or its rock shaft 4L1, are such that in the rocking movements of the shaft, occurring with each revolution of the main shaft, (through connections hereafter described), one crank arm in the train swings to, or, moves desirably, past dead center slightly so that the operation of the plunger is to rise from lowest to highest position and then to dwell, or to dip or recede slightly, before commencing its return movement to lowest position; in the latter instance securing What I will term a sec ondary retraction of the plunger tip, of considerable time duration, but slight linear extent, occurring while the plunger is adjacent its upper limit of movement, in its position of functional cotiperation with the needle.

In operative association with the plunger I provide a clamping mechanism for cooperation with the presser foot to clamp and steady the goods contiguous to the presser foot opening so that the plunger may draw the clamped goods'taut and so hold them before and at the time of needle penetration. It is preferable that these two cooperating parts-plunger and clamp -shall be inter-related so that one is carried by the, other yieldably through the inter-position of a spring between the parts, in order that Wear in the operating parts may not change their special relationship or affect theirgco operative functioning, and to insure their proper coaction with goods of Widely-vary 1n a thickness. M

In the particular construction. shown 'I prefer that the plunger or bender be the positively driven part, sliding in the frame to define the linev of movement of the two cooperating mechanisms-plunger and plunger; p p

plunger is preferably constructed with i i head having lateral extensions 60 as shown in Fig. l5, and the path of movementof said extensions may be partially o overlaid by stops or front-guide projection, 23" flanking trangenient, the front face, or

member yieldingly upon the plurigenfor bodily movementtherewith;a Particularly,

inythe operation of themachine, the goods should be retained and clamped on that side of ithe plunger adjacent to the point of en trance of the needle in order thatthe goods a may not give to the thrust of the needle and maynot tend to follow the needle initsrecip rocating movement; i

figuration; of the clamping means will, of course, be varied to correspond ithsuch yariations as may be made inthe jprecise The precise con form of plunger head, but in the specific construction sl1o\vn,the clamp 70 is a cup a shaped member surrounding, or substan tially surroundingythe head of the plunger and yieldably mounted upon the plunger for reciprocationtherewith. 71 indicates the'riin offthe clarnp,the upper "edge of which constitutes the clamping surface surrounding and spaced apart somewhat from the plunger head to operate against the underside of the presser foot. 72 indicates the annular base of the clamp member surrounding the stem 61 of the plunger below its head. A spring 73 interposed between i i a the plunger barrel 46 andtheclamp ibase,

normally maintains the clamp with its stop pins Mabuttingagainst a stop pin 75 of the plunger and guided in the side slots 6610f the plunger these partshaving sufficient t I looseness of fit so that the clamp is capable of yielding movement to tilt universally to some extent relative to the plungenhead, the clampobviously being slidable longitu dinally uponthe plunger stem. If desired 1 pins Finlay beomitted and theclarnp left J freeito rotate; a U I 1: y Theplunger head may be suitablyshaped according to the character of the Work to 1 be done, a rounded plunger being one comt monly employed in certain classesof work,

andiwheni such construction is used the presser foot opening 23 is usually appropriately shaped to give a clear orifice slightly greater than the size of the plunger tip. *Infsorne classes of Work, however, as in felling edges, the machine may be a given a capacity for handling without readjust indent, materials of Widely lvarying thickness,

limiting the stitch to a given depth, by appropriate relation of the pressenfoot and Under such circumstances the the presser foot opening. With this ar-f stitching side of the goods, cannot be raisedby the a plunger above: a predetermined plane, the j plunger t-ip yielding against spring 64: after the goods.

nesses of Work. that after the needle has started to p relieving from any grinding or abrading ac-f tion that portion of the goods lying between the inoVingaieedIe and the plunger, fand 1 a 'dent to such the hasbroughtthei faceof thewvorktosuch o5 plane; I Therefore the needle, reciprocating in a constant path accuratelypredetermined,

cannot strike deeper into the goods than the settingof these parts iof the machine will pormitfso insuring that thestitching shall beconfined to lthe desired plies or depth plunger are not thickenough to reach the front guide or stop, the natural limit; of

movement of the plunger, acting under-{such circumstances as a jltback? thefgocdsfroin being raised so far asygto cause the stitching to show through onthe p fair side ofthe goodsyand Where no front a 3 guideor stop isused, the plunger raises the fair side of the goods tosubstantiallyfunt formpositionunder widely varying thick-t It will be noted hereinafter plunger: rises to its highest point, it may dip or bob slightlyfa fter the serving other useful functions incl successful and high speediwork.

The feeding of the goods is accomplished dog i 80, operating against the a under surface of the presser foot and driven 1 3 laterally ofthe shafts, or fore-andj-aft as todits directionjof feed, from theivlateraw feed shaftj42, and vertically from theifve a y a tical feed shaft 43. The feed dogysofis axially fixed; solid a thus driven entirely by shafts, dispensing with a universal joints or othermeans forattaining flexibility, but the mounting and connections of the dog are capacit materialinterposed between the presser 00 and different fore-and-aft :areasofthejdo 1 thereby to enable different pointslof the toothed surface of the dog appropriately-to coact with thetv ork. l Also the dog isprefer ably so mounted upon carrier, spring pressed to normal position, that atganvyplane l of its cyclic operation and :regardless of whether ornot the drive shafts are inmo tion, the dog may be depressed to permit theinsertion,removal or shiftingof thef a Work, To the latter: endjI provide in the a connection with the feed dog to the lateral feed shaft 42 a generally horizontal pivotal I connection and in the connection ofsaid dog to the :verticalifeedshaft Iprovide a generally; horizontal connecting element associated with the vertically slidable spring a pressed carrierso that the feed dogniay make Vertical excursions with the verticall moving carr1er,-without substantially 1 l/Vhen thegoods imposedon the guide, prevent enetrate the goods; so p t adesirableand sufi'icient "adaptive,movementsw wThus L i is preferably swiveled on horizontalaxis andis capable of rocking motion to compensate forvariations inythickness of and at its remote extremity said link :'is,

pivoted to a crank 83 mounted on the shaft 42 tov be moved fore-and-aft by the rocking of said shaft. At a' suitable point, preferably near its fore-and-aft center, dog has pivotal connection to the extremity ofa generally-vertical link 84, and because "ofthe pivotal connection of the feed dog to both of the links 82 and 84 its normal, substantially horizontal, presentation to the presser foot is maintained by a spring 85,

connected between a pin 86,- onthe link 84, and a pendant tail80' of the feed dog. The

lower extremity of the link Si is pivoted to v a horizontal armof a bell crank lever 88,

the vertical arm of which, upwardly extends ing, has connection by a substantially-hori- -zontal link 89, with the crank lever 90 working fore-and-aft on the extremity of the vertical feed shaft 43. Obviously the appropriately timed rocking of the two shafts 42 and 43 will impart 4-way feed motion to the feed dog. 1

The pivot 88", on which the bell-crank lever 88 is mounted, is a part of a carrier or carriage 91, said carrier comprising a suitable guide post 92 lying in a suitable opening in the head block40 anda head 93 to which said part is secured by a screw 94 extending through the pivot portion 88'. The "carriage head 93 works in a recess 95 in the head block 40, and upon the head 93 I preferably mount a bumper spring 96 to ease the actionof the carriage under high speed. The carriag'eis normally spring I spring98' passes over pressed upwardly as by a strong leaf spring 98, the tip of which engages in a recess 99 in the carriage head93. The base of the I v a fulcrum lug 100 on. the frame and near its extremity it is engaged by a block'101 adjustable to vary the tension of the spring, as by means of an adjusting screw 102, extending through the block and spring and through a fixed lug 103 of the framerv I The spring 98 holds the carriage 91 nor?- inall'y in raised position so that the 4way movement of the feed may occur in proper vertical relation to to the under side of the-presser foot, but it will be observed that the carriage may be depressed against the tension 0 its leaf horizontal the feedthe goods to be fed, and

either incidentally to the functional of the feed or for the purpose permit the goods to Obviously,

spring,- operations of dropping the feedto be inserted, removed, or shifted.

when the carriage is depressed, carrying with it the pivot member 88Hfor the bell crank lever 88 of the feedsystem the lowering of the bell crank lever draws down the link 84 and with it the feed point, the generally horizontal link 89 and the generally link 82 both swinging downward to accommodate the displacement of the feed point and bell crank lever. Neither of these links need be in precisely horizontal position toaccornmtdate this movement, but they should afford a sufficient aproximation to a parallel link motion so that the lateral disnlacementof their moving ends may be relatively small, compared to the vertical displacement. The arrange- Any appropriate means may be provided for depressingthe carriage 91 at will, the construction herein shown ing frame 104 arranged to act on the spring 98, and a knee lift for actuating said frame. Specifically 105 and 105 indicate end arms of the frame, both looselv pivoted on the plunger shaft ll, and connected by a frame bar 106, one of said. arms as'105, having an extension 106 to act on the spring 98 near its active end and the other arm having a lever extension 107 for operationby the knee lift mechanism 108 upon the table 28. A spring 109 normally holds the rocking frame retracted. r i The'three rock shafts ll, 42, and 43 are driven and timed by three eccentrics 111,

providing a rocki i 112 and 113 respectively, mounted on the main shaft 10, above the post'25 through which the arms 121, 122 and 123, respectively, of the several eccentric straps, extend for connection with the cranks appurtenant to the rock shafts 41,, 412 and 4.3. Eccentrics 111 and 113 for the plunger shaft and the vertical feed shaft may be set or fixed eccentrics of any usual character. The eccentric 112 for operating the horizontal feed shaft 42 is preferably adjustableas to erated as in tacking,

being additionally guided a slotandfpin connection with the disk, as shown at 118,

An adjusting screw 119 taking through the lug 115 into theblock 117, and springs 120 acting between the bottom of therecess 116 1 f andthe lug 115 serve to effect and to hold the desired adjustment of the eccentric, changing the degree-10f its eccentricity but I not its time with reference to themain shaft;

The ar1n121 moved by the eccentric 111 isvconnected to the mid portion of alercr 125 which is p votednear its one end toa depending lug 126 of the end walllof the depending from the frame in substantial alinement Wlth the inner Sltl of the post The strap arm 122 of the adjustable eccentric for the feedisconnected direct to the a wrist pin of crank 130 carried by j horizontali feed shaft 4221I1tl strap arm 123 for the a remaining eccentric 113, has pivotallcons nection with the wrist pin of crank 131 a molintedon 'ertieal feed shaft 43. a i

a will be noted with respect tothelinkage connection from eccentric r111 torockshaft i 41 rat the throw imparted to theshaft ll will the relation between the two cranks128 and a 53 carriedby said shaft 41 isjpreferabl cooperatingwith said presser foot con such, as heretofore described, that the cran thrown over dead center as crank 12S approaches its upper limit of throw fl Among the iml'iortant features of tlie con;

i struetion described; is the capabilitytof the feed mechanism to be lowered at will, re-

gardless of theposition of eitherofa the in} flexible shafts 41 and 42 intheir cyclic op eration. Thisarrangement permits the op] erator to substitute manual control of the feeding of thegoods for theantoinatic feed at any time when the exigencies of the workmay so require. For instance, sharp turns in the goods, to change the direction of the linesot' stitching, may be made, andfespecially when the machine is being ops; padding collars or the a like,-the operator may sew forwardand backward at will, allowingtheforward j feed to be effected by tlIQjalltOmHtlC fQQd;j

mechanismand (after depress ngthe feed) drawing the goods backward byhand.

During sucha manual feeding operation the clamp operates to clamp the goods dur} ing every penetration of the needle sobbviating thepossibility of damaging the [needleal id also insuring ozt the goods on each uch stitch. Obviously proper tensioning spring supported w beof considerable angular extent, and

combination of a presser rocation therewi the gas; may a be shifted or fed laterally whilethe feed dog is held out of commission and thusblind stitch tacking may be done yieldability in all directions gives itjthe a quality of accommodating itself to yarying thicknesses of work, bethey in la by the a other and a the carried elemet r t; espect to the ot1e gives them an automatic compensation coaction with the goods, which in 1s foundto be highlyadvantageous.

and Lfound to be highly desirable in many of its structural details,

or fore-and-aft directionuwith respec the line of feed; and theinter-relation of the clampand the plungerso that oneiscarried I take up the effect of wear,iin their-operat at mg mechanism, anda certa nty of proper pract1ce 1 aswell as the a general ytlOIIlblIlfitlOIt of elements, it will be understood by those skilled in the art that many changesin the specificembodiment might be made without departure from the spirit ofanyinvent-ion and; within the scope of theappendedrlaims What I claim is: a a 1 1 LIna ,blindstitchsewing machi combination of a presser '1 foot haying opening, a plunger working into said ing topresent wlork therethrough, a

one to the plunger, saidclamp and plunger reciprocate that one which "2. In, a blind stitch sewing machinefthe ;foot having an opening, a plunger working into said opening, a clamp contiguousto said plunger, co-

operating witlrthe presser foot, said clamp and plunger being bodily movable togetl and oneyieldably carried by the other,

relativemovement between them, and nice for jpositlrely raising the plunger.

3. 1n ta blind stitch sewing machine, thea combination of a presser foot havingwan opening,a plunger working into said open 1I1g,meansyto reciprocate sa d plunger, and plunger for recip a clamp mounted on said th, yieldable relatiye to the plunger.

In ablindstitchsewing machine, the, combinatlonof a pressen foot havlng an opening, a plunger workin into said open mg, a c 'nnp surroundl said plunger,

1 spring? interposed between fsaidclarnp land plunger, a normally nia intai ng said par with the' perends at pr eterminedr ative levels, and means for reciprocating 'rriec1 by said plunger arranged to tit opening, means reciprocate therewith to act intermittently said plunger with raise its active end the tension of said spring.

5. In a blind stitchsewing machine, the combination of a presser foot having an t opening, a plunger Working into said openin'g, means for reciprocating from and toward said opening, and a clamp yieldingly'mounted on said plunger for re ciprocation therewith to act against the. presser'foot;

6. In a blindystitch sewing machine, the combination of a presser foothaving a cloth opening, a plunger arranged to work into said opening, means for reciprocating said I plungertoward andfrom said opening, a

clamp looselysurrounding the plunger for limited movement longitudinally thereof,

and a spring yieldingly positioning the clamp at one extreme of its movement relative to the plunger.

7. In av blind stitch sewing machine, the combination of a stationary presser foot having a cloth opening, a plunger to work into said opening, means for reciprocating the plunger toward and from said opening,

and a clamp yieldingly mounted on said lunger for reciprocation therewith to act intermittently against the presser foot. 8. In a blind stitch sewing machine, the combination of a pr'esser foot having a cloth opening, a plunger to work into said opening, meansfor reciprocating sai'dplunger toward and from said opening, and a universally with reference to plunger.

h =4 i Stitch Se m ch ne he combination of a presser foothaving a cloth en n a lunse a rk n o; id. Or n: ing, means for reciprocat ng said plunger carried 'by said'plunger arranged to tilt with reference to the "plunger.

l0. a blind stitch sewing machine, the combination of a presser foot having EL ClOth opening, a plunger to work into said cloth for reciprocating said plungr toward and from said cloth opening, and a clamp mounted on said plunger to against the presser foot, said clamp being yiell ngly mounted uponthe plunger to tilt un versally and slide longitudinally relative fs dz Plunger-1 11. In a blind stitch sewing machine, the combination of a presserfoot having a cloth opening, a plunger to work into said cloth forreciprocati'ng said plun Q T toward and from the cloth, opening, and;

nsuin e n qua-shape clam e yl e d -p sl mounted upontheplunger.

12. In, a bli dst'tch sewing machine, the

combination of a presser foot having a cloth respect to said clamp to above the clamp against said plunger pe ing,

cating sa dfplunger toward and from said arranged to impart to the plunger.

ton' ardfrom said opening, and a'clamp p n opening having a yielding tip, and means to reciprocate said plunger.

13. In a blind stitch sewing machine,

into said opening, and means to reciprocate plunger positively between pr'edeter mined limits of travel.

1-5; a blind stitch sewing machine, a

presser foot havingv a cloth opening, a plunger comprising a barrel, a head having a stem extendin into said barrel, and a spring interposed between said head and barrel, and means to reciprocate said plunger to cause it to work into the cloth pemns- 16. a blind stitch sewing machine, the combination of a presser foot having a cloth opening, a two-piece plunger comprising a body portion and" a removable tip, means surround n axially, "and means to reciprocate said lnnger. i

1.7 a b ind, b w ew h ne. t combination of a presser foot having an a plunger, and means for reciprore i s a dip while the plunger is at generally the g mm 15. ts, m vemen wa he Pr er oot.

' a li i ch e n ma hine h mb netiqn a. Pr s r fee ha n a le opening, a plunger, a rock shaft on: said P u r a d. onne t n be ee nd ft and the plunger, to reciprocate the plunger toward and from the presser foot opening,

. and to eflt'ect a secondary retraction of the plunger while the. latter is at approximately the extreme of its, movement toward the presser foot.

119K111 a blind stitch sewin machine, the combination of'a presser foot having a cloth opening, a plnnger to work therein, a, roclr shaft for said plunger, and operative connection between said" plunger comprising a crank arranged to be thrown past dead, center with respectto the plunger,

in. the course of the, oscillation of" the shaft, ere y t ywse a S o dary re a ion, the plunger of small extent while the plunger is adjacent the extreme of its range of mpvement toward the pressser foot.

2D- I, al-b indcst t f sew ng machi e, he. combination or a presser foot having an pen n a ront ide Part a y a d Pr sse -"t t qnt s ous t a pe i g, a yielding plunger to cooperate withsaid a plunger to work into said cloth the combination of a presser foot having a cloth said'body portion to guide it and shaft 1,254,818 a i a opening and front guide part, and means i to reciprocate said plunger between predetermined limits oftravel.

combination of a presser foot having a cloth opening, feeddevices on one side of the presser foot comprising a teeddog, means for operating said feed dog, and neans for throwing said feed dog into or out; of position vhile the machine is in operation, a

plunger on the same side ofthe presser foot, i meansto reciprocate said plunge ton ard i and from the cloth opening in the presser a foot, and a iclamp carried by the plunger.

22. In a blind stitch sewing machine, the

combination of apresser foot having acloth opening, feed devices on one side of the presser foot comprising a feed dog, means for operating said feed dog, and means for throwing said feed dog into or outof positionwh le the machine is in operation, a

lon er on the same side of the )resser foot P i e n ieans to reciprocate said plunger toward and from the cloth openingin the presser foot, andia clamp yieldingly mounted on the plunger and reciprocating therewith.

23. In a blind stitch sewing machine, the combination of a presser foot having a cloth opening, feed devices on one sideof the presser foot comprising a feed dog, i imeansyfor operating said feed dog,a11d means for throwing said feed dogiinto or out of position while themachine is in operation, a lunger on, thesamesideof the presser oot, means to reciprocate said plungertoward and from the cloth opening in the presser foot, a clamparranged to act upon a small area of the goods contiguous to the plunger and yieldable relativetothe presser foot. i i

24. In a blind stitch sewing machine, the

con binationof'a presserfoot having a cloth opening, stitch-forming mechanism above the presser foot, feed mechanism below the presser foot comprising a feed dog, means foraetuating saidfeed dog for'cyclicmovements, means for throiving said feed dog into or out of operative relations to the presser foot during the operation of themachine, a plunger reciprocable from and toward the presser-foot opening,

i ranged to coact witha small goods contiguous to theplunger to clamp a clamp arthe same against the presser foot, and means to reciprocate the plunger and the clamp. a

25. In a blind stitch sewing machine, the

a a combination of apresser foot having a cloth opening, aplunger to work thereln, a clamp i iyieldingly carried by the plunger, and means 1 to reciprocate said plunger comprising a 1 rock shaft, a crank thereon, and an adjustable connect on between the crank and plungerQ w N i 26.Ina blind stitch sewing machine, the

combination ofa pressenfoothav g open ng, a plunger to Worktherein, aiclamp yieldingly carried by the plungerfand ar- 21. In a blind stitch sewing machine, the ranged to tilt thereon, and means to recipi versally relative to the presser foot.

area of the cate said plunger comprising arock shaft a crank thereongand an ad ustable conne tion bet veenthe crank and plunger.

27; In a blindstitclrseiving mabhi h a combination of a framei providing" a base,

and an overhanging armQStitch-IOrming mechanism, and a stationarypresser-foot,

bearings at opposite endsythree shaftsn in the base hav ng fixed bear ngs thereinyand located in a sectional area of small compass,

la plunger Qperatively eonnectedtdone of said shafts jfOr reciprocat on tofcooperate with thepresser foot, a feed do operatively connected to the other two sha? from one thereof ahorizontal component of a movement and from the other itsf vertical flcomponent of moi ement, and means to clee w pressisaid feed dogto an inoperativeplane Withoutdisturbing itsshaft. i h i 28. In a, blind stitch sewing machine, the a in combination of a presser foot having a Work a opening, stitch forming means working on modate inequalities of Work-thickness, said clampand feedpart being on the same side of the presser foot; a a a 29 .3In a blind stitch sewing machine, the combination of a presser foot, a feedpart opposing the presser foot, and a clamp coacting with the presserfoot,arranged to tilt ,ti niVISnlly with reference to said presser foot, said feed part and clamp being on the same side of the presser foot.

30. In a blind stitchsewing machine, the combination of a presser foot, a plunger, means to reciprocate said plunger toward and from said presser foot and a clamp disposed on the same side oi the presser foot as the plunger-and,mounted to tilt uni 31. In a blind stitch sewing machine, the

combination of a presser toot, a plunger, means to reciprocate said plunger toward and fromsaid presser foot.and a clamp disposed on thesame sideof the presser foot as the plunger and mounted to tilt transversely of the line of feed. a f

h 32. In a blind stitch sewing machine,the

combination of a presserfoot having an opening,} a plunger, means to reciprocate saidJpIunger to and from saldopening, a

feed dog, meansto impart 4-way motionflto said feed dog, connectedto saiddogto per-j; Init thelatter' to tilt relatiye 1101118 presser cloth ts to receive foot, 2 clamp-on the same side of the presser foot as said dog and plunger, and a yielding support for said clamp .Whereon said clamp is mounted to tilt relative to the presser foot.

33. In a blind. stitch sewing machine, the

combination of a resser foot having an.

opening, a plunger, a clamp, means to reciprocate said plunger and clamp toward and from the presser foot, a feed dog, means I to. move said feed dog in its cyclic operation,

ain nit-. 11: eaten; my qbtaiacg or.

and means. ,to move said feed dog to inoperetive position, whereby the goods are subjectto manual feed movements subject, however, to the action of the clamp.

In testimony whereof I hereunto set my hand in the presence of two Witnesses.

JOHN G. LEWIS.

In the presence of- I Gno. T. MAY, J12, M RY F. ALLEN.

five c ts each, ye r ssinz he: Commissione 0!. t n

Washinx m 6-? 

